Does anybody know where I can purchase pre slotted fretboards wide enough for building a 5 string bass?
Stew Mac has boards, but not wide enough. And way too expensive IMO.
Warmoth used to sell boards (many moons ago), but I haven't seen them on their site in a long while. Maybe, worth a phone call.
Honestly, I'd prefer to get one or two maybe from one of the ever growing list of builders here on MG.
Luthiers Mercantile offer a slotting service on their boards.